Martin married Jane Coffey who was the daughter of John Coffey and Hannah Wilson Coffey.
They had two sons:
1. Christopher Columbus Coffey who (according to records from the National Archvies) "mustered into the army in "Madison Indiana, on August 15, 1861 enlisting for a period of three years. Was "sick in the hospital at Jacinto since July 12 (1862). Died of disease on July 31, Corinth." Christopher Coffey is buried at the National Cemetery in Corinth, Mississippi." (His headstone is incorrectly marked S. C. Coffey)
2. James Martin Coffey who (according to records from the National Archives) "Mustered into the army in Indiana, on August 15, 1861 (enlisting at the same time as his brother, Christopher C. Coffey.) "Enlisted as a Private on 15 August 1861 Enlisted in Company I, 22nd Infantry Regiment Indiana. Died Company I, 22nd Infantry Regiment Indiana; December 1861 in Syracuse, MO"